void PersistentStore_Scan(
PersistentStoreData *storeData,
PersistentStoreSharedData *storeSharedData,
PersistentStoreScanTupleCallback scanTupleCallback)
{
WRITE_PERSISTENT_STATE_ORDERED_LOCK_DECLARE;
PersistentStoreScan storeScan;
ItemPointerData persistentTid;
int64 persistentSerialNum = 0;
Datum *values;
values = (Datum*)palloc(storeData->numAttributes * sizeof(Datum));
WRITE_PERSISTENT_STATE_ORDERED_LOCK;
PersistentStore_BeginScan(
storeData,
storeSharedData,
&storeScan);
while (PersistentStore_GetNext(
&storeScan,
values,
&persistentTid,
&persistentSerialNum))
{
bool okToContinue;
okToContinue = (*scanTupleCallback)(
&persistentTid,
persistentSerialNum,
values);
if (!okToContinue)
break;
}
PersistentStore_EndScan(&storeScan);
WRITE_PERSISTENT_STATE_ORDERED_UNLOCK;
pfree(values);
}
static void PersistentStore_DoInitScan(
PersistentStoreData *storeData,
PersistentStoreSharedData *storeSharedData)
{
PersistentStoreScan storeScan;
ItemPointerData persistentTid;
int64 persistentSerialNum;
ItemPointerData previousFreeTid;
Datum *values;
int64 globalSequenceNum;
values = (Datum*)palloc(storeData->numAttributes * sizeof(Datum));
MemSet(&storeSharedData->maxTid, 0, sizeof(ItemPointerData));
PersistentStore_BeginScan(
storeData,
storeSharedData,
&storeScan);
while (PersistentStore_GetNext(
&storeScan,
values,
&persistentTid,
&persistentSerialNum))
{
/*
* We are scanning from low to high TID.
*/
Assert(
PersistentStore_IsZeroTid(&storeSharedData->maxTid)
||
ItemPointerCompare(
&storeSharedData->maxTid,
&persistentTid) == -1); // Less-Than.
storeSharedData->maxTid = persistentTid;
PersistentStore_ExtractOurTupleData(
storeData,
values,
&persistentSerialNum,
&previousFreeTid);
if (Debug_persistent_recovery_print)
(*storeData->printTupleCallback)(
PersistentRecovery_DebugPrintLevel(),
"SCAN",
&persistentTid,
values);
if (!PersistentStore_IsZeroTid(&previousFreeTid))
{
/*
* Non-zero previousFreeTid implies a free entry.
*/
if (storeSharedData->maxFreeOrderNum < persistentSerialNum)
{
storeSharedData->maxFreeOrderNum = persistentSerialNum;
storeSharedData->freeTid = persistentTid;
}
if (!gp_persistent_skip_free_list)
{
PersistentStore_InitScanAddFreeEntry(
&persistentTid,
&previousFreeTid,
/* freeOrderNum */ persistentSerialNum);
}
}
else
{
storeSharedData->inUseCount++;
if (storeSharedData->maxInUseSerialNum < persistentSerialNum)
{
storeSharedData->maxInUseSerialNum = persistentSerialNum;
storeData->myHighestSerialNum = storeSharedData->maxInUseSerialNum;
}
}
if (storeData->scanTupleCallback != NULL)
(*storeData->scanTupleCallback)(
&persistentTid,
persistentSerialNum,
values);
}
PersistentStore_EndScan(&storeScan);
pfree(values);
globalSequenceNum = GlobalSequence_Current(storeData->gpGlobalSequence);
/*
* Note: Originally the below IF STMT was guarded with a InRecovery flag check.
* However, this routine should not be called during recovery since the entries are
* not consistent...
*/
Assert(!InRecovery);
if (globalSequenceNum < storeSharedData->maxInUseSerialNum)
{
/*
* We seem to have a corruption problem.
*
* Use the gp_persistent_repair_global_sequence GUC to get the system up.
*/
if (gp_persistent_repair_global_sequence)
{
elog(LOG, "Need to Repair global sequence number " INT64_FORMAT " so use scanned maximum value " INT64_FORMAT " ('%s')",
globalSequenceNum,
storeSharedData->maxInUseSerialNum,
storeData->tableName);
}
else
{
elog(ERROR, "Global sequence number " INT64_FORMAT " less than maximum value " INT64_FORMAT " found in scan ('%s')",
globalSequenceNum,
storeSharedData->maxInUseSerialNum,
storeData->tableName);
}
}
else
{
storeSharedData->maxCachedSerialNum = globalSequenceNum;
}
if (Debug_persistent_recovery_print)
elog(PersistentRecovery_DebugPrintLevel(),
"PersistentStore_DoInitScan ('%s'): maximum in-use serial number " INT64_FORMAT ", maximum free order number " INT64_FORMAT ", free TID %s, maximum known TID %s",
storeData->tableName,
storeSharedData->maxInUseSerialNum,
storeSharedData->maxFreeOrderNum,
ItemPointerToString(&storeSharedData->freeTid),
ItemPointerToString2(&storeSharedData->maxTid));
if (!gp_persistent_skip_free_list)
{
PersistentStore_InitScanVerifyFreeEntries(
storeData,
storeSharedData);
}
else
{
if (Debug_persistent_recovery_print)
elog(PersistentRecovery_DebugPrintLevel(),
"PersistentStore_DoInitScan ('%s'): Skipping verification because gp_persistent_skip_free_list GUC is ON",
storeData->tableName);
}
}
static void PersistentStore_DoInitScan(
PersistentStoreData *storeData,
PersistentStoreSharedData *storeSharedData)
{
PersistentStoreScan storeScan;
ItemPointerData persistentTid;
int64 persistentSerialNum;
Datum *values;
int64 globalSequenceNum;
values = (Datum*)palloc(storeData->numAttributes * sizeof(Datum));
PersistentStore_BeginScan(
storeData,
storeSharedData,
&storeScan);
while (PersistentStore_GetNext(
&storeScan,
values,
&persistentTid,
&persistentSerialNum))
{
/*
* We are scanning from low to high TID.
*/
PersistentStore_ExtractOurTupleData(
storeData,
values,
&persistentSerialNum);
if (Debug_persistent_recovery_print)
(*storeData->printTupleCallback)(
PersistentRecovery_DebugPrintLevel(),
"SCAN",
&persistentTid,
values);
storeSharedData->inUseCount++;
if (storeSharedData->maxInUseSerialNum < persistentSerialNum)
{
storeSharedData->maxInUseSerialNum = persistentSerialNum;
storeData->myHighestSerialNum = storeSharedData->maxInUseSerialNum;
}
if (storeData->scanTupleCallback != NULL)
(*storeData->scanTupleCallback)(
&persistentTid,
persistentSerialNum,
values);
}
PersistentStore_EndScan(&storeScan);
pfree(values);
globalSequenceNum = GlobalSequence_Current(storeData->gpGlobalSequence);
/*
* Note: Originally the below IF STMT was guarded with a InRecovery flag check.
* However, this routine should not be called during recovery since the entries are
* not consistent...
*/
Assert(!InRecovery);
if (globalSequenceNum < storeSharedData->maxInUseSerialNum)
{
/*
* We seem to have a corruption problem.
*
* Use the gp_persistent_repair_global_sequence GUC to get the
* system up.
*/
if (gp_persistent_repair_global_sequence)
{
elog(LOG, "need to repair global sequence number " INT64_FORMAT
" so use scanned maximum value " INT64_FORMAT " ('%s')",
globalSequenceNum,
storeSharedData->maxInUseSerialNum,
storeData->tableName);
}
else
{
elog(ERROR, "global sequence number " INT64_FORMAT " less than "
"maximum value " INT64_FORMAT " found in scan ('%s')",
globalSequenceNum,
storeSharedData->maxInUseSerialNum,
storeData->tableName);
}
}
else
{
storeSharedData->maxInUseSerialNum = globalSequenceNum;
}
if (Debug_persistent_recovery_print)
elog(PersistentRecovery_DebugPrintLevel(),
"PersistentStore_DoInitScan ('%s'): maximum in-use serial number "
INT64_FORMAT ,
storeData->tableName,
storeSharedData->maxInUseSerialNum);
}
/*
* Rebuild free TID list based on freeEntryHashTable. Returns number
* of free tuples in the rebuilt free list.
*/
uint64
PersistentStore_RebuildFreeList(
PersistentStoreData *storeData,
PersistentStoreSharedData *storeSharedData)
{
Datum *values;
PersistentStoreScan storeScan;
ItemPointerData persistentTid;
ItemPointerData previousFreeTid;
ItemPointerData previousTid;
uint64 persistentSerialNum;
uint64 freeOrderNum;
values = (Datum*)palloc(storeData->numAttributes * sizeof(Datum));
/*
* PT shared data must be already initialized, even when we are
* called during recovery.
*/
Assert(!PersistentStore_IsZeroTid(&storeSharedData->maxTid));
if (storeSharedData->maxFreeOrderNum < 1)
{
elog(LOG, "no free tuples in %s, not building any free list",
storeData->tableName);
return 0;
}
elog(LOG, "rebuilding free list in %s with " INT64_FORMAT " free tuples",
storeData->tableName, storeSharedData->maxFreeOrderNum);
/*
* Scan PT for free entries (in TID order) and establish links
* with previous free entry as we go on.
*/
previousTid.ip_posid = 0;
freeOrderNum = 0;
PersistentStore_BeginScan(storeData, storeSharedData, &storeScan);
while (PersistentStore_GetNext(
&storeScan,
values,
&persistentTid,
(int64 *)&persistentSerialNum))
{
/*
* We are scanning from low to high TID. All TIDs we
* encounter should be smaller or equal to the known
* maxTid.
*/
Assert(ItemPointerCompare(
&storeSharedData->maxTid,
&persistentTid) >= 0);
PersistentStore_ExtractOurTupleData(
storeData,
values,
(int64 *)&persistentSerialNum,
&previousFreeTid);
if (!PersistentStore_IsZeroTid(&previousFreeTid))
{
values[storeData->attNumPersistentSerialNum - 1] =
Int64GetDatum(++freeOrderNum);
values[storeData->attNumPreviousFreeTid - 1] =
ItemPointerIsValid(&previousTid) ?
PointerGetDatum(&previousTid) :
PointerGetDatum(&persistentTid);
#ifdef FAULT_INJECTOR
/*
* Inject fault after free list is partially built - a few
* tuples are updated but at least one is yet to be
* updated.
*/
if (freeOrderNum > 3)
{
FaultInjector_InjectFaultIfSet(
RebuildPTDB,
DDLNotSpecified,
"", // databaseName
""); // tableName
}
#endif
PersistentStore_UpdateTuple(
storeData, storeSharedData, &persistentTid, values, true);
ItemPointerCopy(&persistentTid, &previousTid);
}
}
PersistentStore_EndScan(&storeScan);
pfree(values);
if (ItemPointerIsValid(&previousTid))
{
Assert(freeOrderNum > 0);
ItemPointerCopy(&previousTid, &storeSharedData->freeTid);
storeSharedData->maxFreeOrderNum = freeOrderNum;
elog(LOG, "rebuilt free list in %s: maxFreeOrderNum = " INT64_FORMAT
" freeTid = %s", storeData->tableName, freeOrderNum,
ItemPointerToString(&persistentTid));
}
return freeOrderNum;
}
static void PersistentStore_DiagnoseDumpTable(
PersistentStoreData *storeData,
PersistentStoreSharedData *storeSharedData)
{
if (disable_persistent_diagnostic_dump)
{
return;
}
MIRROREDLOCK_BUFMGR_DECLARE;
PersistentStoreScan storeScan;
ItemPointerData persistentTid;
int64 persistentSerialNum;
Datum *values;
BlockNumber lastDisplayedBlockNum;
bool displayedOne;
BlockNumber currentBlockNum;
elog(LOG,
"Diagnostic dump of persistent table ('%s'): maximum in-use serial number " INT64_FORMAT ", maximum free order number " INT64_FORMAT ", free TID %s, maximum known TID %s",
storeData->tableName,
storeSharedData->maxInUseSerialNum,
storeSharedData->maxFreeOrderNum,
ItemPointerToString(&storeSharedData->freeTid),
ItemPointerToString2(&storeSharedData->maxTid));
values = (Datum*)palloc(storeData->numAttributes * sizeof(Datum));
PersistentStore_BeginScan(
storeData,
storeSharedData,
&storeScan);
lastDisplayedBlockNum = 0;
displayedOne = false;
while (PersistentStore_GetNext(
&storeScan,
values,
&persistentTid,
&persistentSerialNum))
{
/*
* Use the BlockIdGetBlockNumber routine because ItemPointerGetBlockNumber
* asserts for valid TID.
*/
currentBlockNum = BlockIdGetBlockNumber(&persistentTid.ip_blkid);
if (!displayedOne || currentBlockNum != lastDisplayedBlockNum)
{
Buffer buffer;
PageHeader page;
XLogRecPtr lsn;
/*
* Fetch the block and display the LSN.
*/
// -------- MirroredLock ----------
MIRROREDLOCK_BUFMGR_LOCK;
buffer = ReadBuffer(
storeScan.persistentRel,
currentBlockNum);
page = (PageHeader) BufferGetPage(buffer);
lsn = PageGetLSN(page);
ReleaseBuffer(buffer);
MIRROREDLOCK_BUFMGR_UNLOCK;
// -------- MirroredLock ----------
elog(LOG, "Diagnostic LSN %s of page %u",
XLogLocationToString(&lsn),
currentBlockNum);
lastDisplayedBlockNum = currentBlockNum;
displayedOne = true;
}
/*
* Display the persistent tuple.
*/
(*storeData->printTupleCallback)(
LOG,
"DIAGNOSE",
&persistentTid,
values);
}
PersistentStore_EndScan(&storeScan);
pfree(values);
}
static void PersistentBuild_ScanGpPersistentRelationNodeForGlobal(
Relation gp_relation_node,
int64 *count)
{
PersistentFileSysObjData *fileSysObjData;
PersistentFileSysObjSharedData *fileSysObjSharedData;
PersistentStoreScan storeScan;
Datum values[Natts_gp_persistent_relfile_node];
ItemPointerData persistentTid;
int64 persistentSerialNum;
PersistentFileSysObj_GetDataPtrs(
PersistentFsObjType_RelationFile,
&fileSysObjData,
&fileSysObjSharedData);
PersistentStore_BeginScan(
&fileSysObjData->storeData,
&fileSysObjSharedData->storeSharedData,
&storeScan);
while (PersistentStore_GetNext(
&storeScan,
values,
&persistentTid,
&persistentSerialNum))
{
RelFileNode relFileNode;
int32 segmentFileNum;
PersistentFileSysRelStorageMgr relationStorageManager;
PersistentFileSysState persistentState;
PersistentFileSysRelBufpoolKind relBufpoolKind;
TransactionId parentXid;
int64 serialNum;
ItemPointerData previousFreeTid;
PersistentFileSysObjName fsObjName;
bool sharedStorage;
GpPersistentRelfileNode_GetValues(
values,
&relFileNode.spcNode,
&relFileNode.dbNode,
&relFileNode.relNode,
&segmentFileNum,
&relationStorageManager,
&persistentState,
&relBufpoolKind,
&parentXid,
&serialNum,
&previousFreeTid,
&sharedStorage);
if (persistentState == PersistentFileSysState_Free)
continue;
PersistentFileSysObjName_SetRelationFile(
&fsObjName,
&relFileNode,
segmentFileNum,
NULL);
fsObjName.hasInited = true;
fsObjName.sharedStorage = sharedStorage;
if (relFileNode.spcNode != GLOBALTABLESPACE_OID)
continue;
if (relationStorageManager != PersistentFileSysRelStorageMgr_BufferPool)
elog(ERROR, "Only expecting global tables to be Buffer Pool managed");
InsertGpRelfileNodeTuple(
gp_relation_node,
relFileNode.relNode, // pg_class OID
/* relationName */ NULL, // Optional.
relFileNode.relNode, // pg_class relfilenode
/* segmentFileNum */ 0,
/* updateIndex */ false,
&persistentTid,
persistentSerialNum);
(*count)++;
}
PersistentStore_EndScan(&storeScan);
}
